MetaKinds - PolyKinds generalization
MetaKinds is more general then PolyKinds.
Now we could write with PolyKinds
class Foo (a :: k) where ...It would be nice if we could also write with MetaKinds next:
class Foo (a :: (k :: *)) where ...As we already have Rank2Types and RankNTypes,
PolyKinds ~ Rank2Types,
MetaKinds ~ RankNTypes
This will be valid:
class Foo (a :: (k :: (u :: *))) where ...Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.6.3 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
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| Operating system | |
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